cards that untap creatures mtg Slumbering Cerberus - Creature - tap all untapped creatures that share a creature type with it or untap all tapped creatures that share a creature type with it. o:"untap all creatures" · Scryfall

The only real catch is practicality, since it can be a little inconvenient if your opponents arent familiar with the card and need to check Oracle text

Here you see that people have fallen to the temptation of the power offered by your Mythos creature, or Emrakul playing into that role on the plane of Innistrad

(The phases are, in reverse order, ending, second main, combat, first main, and beginning.) As long as there are more than two players in the game, the turn order is reversed

After that, it seems like this foil should be a solid steady gainer moving forward

This is a great flicker spell from Theros: Beyond Death that gives you a little more flexibility in whatever you need to flicker at a moment's notice